I hear that you could have learned them in his cheat pdf, but he was unfortunately forced to take it off of his website. In his Blood Marking System, he says he is still fighting to get the pdf back up, I'm hoping he will succeed because it sounds awesome.
Considering the Hi-Lo count system is probably one of if not the easiest system to use, he may have used that system. It's the most used I believe and you can learn it very easily. go to google.com and type in Hi-Lo count system. Daniel Madison probably used a much more advanced system though. The Hi-Lo count system is a good place to start. I'm learning it right now. I have to learn basic startegy first though There's a lot to remember.